Sawmill carriage



June P. F. LUETH SAWMILL manner:

Filed June 14. 1924 5 Sheets-Sheet 1 luvgu'ron W TNES 5 Sheets-Sheet 3 INVENTOR ATTORNEY P. F. LUETH SAWMILL CARRIAGE Filei June 14, 1924 .PauZFL ueih June 14 27,

WITNESSES J ne 14,4927. 4 1, 3 8

P. F. LUETH SAWMILL CARRIAGE 5 sums-Sheet 4 Filed June 14, 1924 1,632,708 June 14, 1927. P. F. LUETH SAWMILL CARRIAGE Filed June 14, 1924 5 Sheets-Sheet 5 v Baal EL z'i'fii wlTN E 55 ES MW av I g? 1W to its center line.

Patented June 14, 1927.

1,632,708 PATENT OFFICE.

' PAUL FREDRICK- LUETH, or EVERETT, WASHINGTON, ASSlGNOR TO SUMNER anon wo'nxs, or EVERETT, WASHINGTON, FA CORPORATION or'Washmoron.

SAWM LL CARRIAGE.

Application filed Ill-Ire 1 4, 1 9 24. Serial ml 720,053.

This invention relates to saw mill carriages, and particularly to mechanisin{designed to facilitatelthe properpositioning of logs on the carriage, as well as to assist in thetransfer of the logs to and from the same. r V v In the method of sawing-logs, whichis at present, almost invariably used, in orderto permit the least possible waste of material insawing the'log, the latteris so positioned on the'carriag'e asto cause the saw ion-aver through the same in a plane paiallelto'the outside line of the log,insteadof pa allel Since the knees are usually connected rigidly to the setting mechanism, it is necessary to introduce some other means for bringing the small end of thelog up ahead of theface of the knees a distance equal to the amount of taper-in the log. This has usually been accomplished by a crude and cumbersome method offinterposing wooden sp'acerblocks between the t'aceof the knee and the-log, which blocks were of sufiicient thickness to allow for the taperot thelog, This is'an expensive method owing to the amount ottime-required in securinga block ofthe'right thickness, and

also because of thetime and material re- A quired in making these spacer blocks, which are necessarily short lived and therefore required in great numbers. This method is also very dangerous to the operator.

One of the principal objects of the present invention is to provide. animproved ta pering device, preterably power operated, which is movable with respect to the knee,

and by means of which the proper taper may a be quickly and accurately secured by making the proper adjustment either-before or after the log has been rolled on the carriage.

Another important object .is to provide ting mechanism.

.ing the same.

Eigiure 3.

The mechanism for accomplishing the loregoin g advantages is'..en1bodied in va unitary device, which is simple and inexpensive, positive in itsresults, land which may be installed on anytype of 'headblock now in use with only slight expense in adapt- 1 jected beyond the 'face' votthe knee-and positivelyheld'in 'theproperposition toform a taper for therlog or it mayibepneumatically held in its projected,.position toiformya buii'er when moving the log into position LBy forcibly projecting the ram, the end of the log may, if necessaryfbeset out afterrthe log is on the carriage, and projecting the rains simultaneously to the fullest extent, the device may be operated as a-ki-cker toremove the :cant ffrom. the carriage.

The advantages .ot' the inventionuas well as its details of construction willv bemore clearly understood ,i'rom the following detailed description taakenin connectionwvith the accompanying drawings, which illustrate the invention 1 in. its preferred .l'orm. n

Inthe drawings; I q lFigiu'e 1 his ,perspeetive view not a carri age with a screw operated rhead block constructe d iaccordcing toflthe invent-ion.

Figure 2 is a ,p'erspectiveview of the head blockiron'ianotheriangle.

Figure Zi is ai longitu'dinalverticalisection through i the knee, with :a [portion ot the p p head blockf shown in elevation. i

a vbuli'er, cushioned preferably by pneumatic ligure Al isla horizontal section through the plston a ndfva'lve, taken on the line Figure 5 isia vertical section through the ,valvetaken on the line Figure,

Figure 6 is'an'end viewiof the cylinderiand valve casing, a part thereof-being shown'in section. r -Figure 7 is'a side elevationoi' the valve casing, looking from the line 7 -7 ofFig- 1 an 7 endf-vieav; of; the; a valve Figure J 8 is p with a par't thereof shown n sec? Q tion.

Figure 9 is a horizontal section through the side of the valve casing, showing the inlet and exhaust ports.

Figure 10 is an end view of the hose reel.

Figure 11 is a view partly in elevation and partly in section, looking from the right of Figure 10.

Figure 12 is a sectional view of the air connection for the hose reel.

Figure 13 is a detail sectional view, taken axially through the cam which controls the pawl for positioning the ram.

Figure 11 is a detail perspective view of the cam.

Figure 15 is the hand lever ing the mm.

Figure 1G is the pawl.

Figure 17 is adetail perspective view of the valve operating lever.

For the sake of illustrating the structure and operation of my invention, I have shown it in connection with a carriage 1 of usual structure having head blocks 2 provided with guideways 3, on which the knee 1 is reeiprocably mounted. In the type of machine shown, this reciprocation is effected through the medium of bevelled gears 5, operated by a power shalt 6.

In this invention, the knee at difiers from the usual construction by being hollow and having a rectangular opening through the front face which forms a guideway T, in which a ram 8 is mounted for reciprocation. This ram is formed at its rear end with a reduced portion 9 extending through the rear face of the knee, and provided at its rear end with a piston 10 having the usual rings 11. The piston operates within a cylinder 12 which is provided with a peripheral flange 13, which is secured to the rear face of the knee by means of bolts 14., or the like. The rear wall of the knee has a depressed portion 15 surrounding the rearwardly extended portion 9 of the ram, and receives suitable packing rings 16, which form an air-tight connection between the knee and cylinder 12. The ram is preferably made hollow, and its inner extremity is closed by a suitable plug 17. (Fig.

The ram 8 is adapted to be projected from the front face of the knee, and for holding it in various positions when used as a tapering device a central web is formed therein and provided with a plurality of stepped notches 18 for engagement by a gravity pawl or stop latch 19, which is pivotally mounted on a pin 20 extending transversely across the rear upper portion of the knee. In order to fix the position of the pawl so as to engage any one of the notches 18, the same is provided with a rearward fiat-faced extension 21, the upper face of which is adapted to be engaged by a cam 22 secured to a rock a detail perspective view of socket for manually operata detail perspective view of shaft 23. The cam 22 is provided with a plurality of flat faces 21 at dill'erent distances from its axis, and the rock shalt 2 is extended at one end beyond the side oi the knee and provided with a lever arm 25. by means 01' which it may be :Lllfjjllill'l) adjusted to bring any one ol the faces into engagement with the extension 21, and thereby adjust the pawl 19 tor engagement with the desired notch 18. (Figs. 2 and ll.)

The position of the ram f and its movement in either direction controlled preterably through the piston 10 by means or comprcssed air, steam or other tiuid iutror'lu ed into either end of the cylinder 1'. through 1 hose 26 and valve casing 27. (Figures 2 and The valve casing is provided with a flange 27, which cooperates with a similar flange 27f formed on the side ot the cylinder 12, (Fig. 7 )to secure the valve casing in operative relation to the ports in the cylinder. The cylinder is provided at or near its ends with inlet ports 2; and 2.) and exhaust ports 30 and 31, and the passage of the steam or air thercthrough is controlled by a valve 32 operating within the casing The valve 32 is in the shape of a piston secured to a stem 32 and formed with an intermediate reduced portion which, when the valve is in neutral position, is opposite the cent ral portion of the chamber 53. which is connected to the supply pipe 26. Movcmcnt of the valve to the left or right, however. will establish con'nnunication between the chamber 33 and one of the passageways or parts 3 1 or 35, (Fig. 5) which are in communication with the inlet ports 25; and 2f) respectively. The rate of admission of the operating fluid through the ports 31 and 3.7 may be controlled by means of choker screw As the valve 32 is moved to place the t ber 33 in communication with one or the other of the inlet ports. the exha 2;. port leading from the opposite end of the cylinder is at the same time placed in communication with the corresponding exhaust port 37 or 38 in the valve casing, (Fig. 5) which is uncovered by the end ot the valve. The ports 37 and 38 are in con'miunication with an exhaust pipe 3.) leading to any conv nient point of discharge. The ends ot the casing 27 are closed by suitable pa rings 10 and 11 through which the stem L projects, and the valve is normally held in neutral position, as shown in liigures i and 5, by means of a spring 42 which surrounds illithe valve stem within the housing -13. and acts between the packing ring 4-0 and 2. mad

4 secured to the valve stem.

For actuating the valve in either direction, one end of the stem 32 pivotally connected to the lower end of an arm secured to one end of a rock shaft 40. which is journaled in a plate -17 secured to the outer end of the cylinder 12. To the opof an adjustable hollow knee, a ram adapted to be housed therein, means operable by fluid pressure for projecting or retracting said am, and means for securing the'ram in various positions of adjustment.

2. In a saw mill carriage, the combination of an adjustable'knee having a longitudinal guideway therethrough, a ram mounted in said guideway, means operable by fluid pressure for projecting and retracting the ram, and means for adjustably limiting the extent of retraction.

3. In a saw mill carriage, the combination of an adjustable knee having a longitudinal guideway therethrough, a ram mounted in said guideway, and means operable by fluid pressure for projecting or retracting the ram.

4. In a saw mill carriage, the combination of an adjustable knee having a longitudinal guideway therethrough, a ram mounted in said guideway, a piston carried by the rear end of the ram, a cylinder in which the piston is guided, and means for selectively introducing fluid pressure into either end of the cylinder and simultaneously exhausting the other end.

In a saw mill carriage, the combination of a. knee having a recess therein, a ram mounted for reciprocation in said recess, a piston secured directly to the rear end of the ram, a cylinder in which the piston is guided, means for selectively introducing fluid pressure into either end of the cylinder and simultaneously exhausting the other end, and adjustable stop mechanism for positively limiting the rearward movement of the ram.

(3. In asaw mill carriage, the combination of a hollow knee, a ram projectable therefrom. means operable by fluid pressure to project the ram to kick off the cant, to hold the same in projected position to act as a buffer, or to retract the ram, and a latch cooperating with the fluid pressure means, to hold the ram in a partly retracted position to act as a taper device.

7. In a saw mill carriage, the combination of an adjustable knee having a longitudinal guideway therethrough, a ram mounted in said guideway, means operable by fluid pressure for projecting or retracting the ram, amanually operable lever pivoted to the knee, and engaging the ram to advance or retract the same in the absence of fluid pressure.

8. In a saw mill carriage, the combination of a hollow knee, a ram adapted to be housed therein, means for advancing and retracting the ram, said ram being provided on its upper side with rearwardly facing stepped notches, a gravity pawl mounted above the ram, and adjustable means to limit the movement of the pawl under the influence of gravity to a position in the path of any selected one of said notches, whereby to positively stop the retractive movement of the ram at a predetermined point.

9. In a saw mill carriage, the combination of a knee having a guideway, a' ram mounted for reciprocation in the guideway, means for advancing or retracting the rain, said ram being provided with rearwardly tat-ingstepped notches, a gravity pawl pivoted within the knee and having a flat laced portion extending rearwardly l'rom its pivot, a cam rotatably mounted above the rear wardly extending portion of the pawl and having a plurality of flat faces at dill'ereut distances from its axis, and means for adjusting the cam to causeany one of its faces to engage the flat laced portion of the pawl, thereby positioning the pawl in the path of a selected one 01 said notches to limit the rearward movement of the ram.

l0. In a saw mill, carriage, the combination of a hollow knee, a ram mounted for reciprocation therein, means operable by fluid pressure for advancing or retracting the ram, a valve controlling said fluid pressure, and means auton'iatically operable by the ram when fully retracted to restore the valve to neutral position.

11. In a saw mill carriage, the combination of a guideway, a rain mounted tor re ciprocation therein and formed at its rear end with a piston, a cylinder within which said piston operates, a valve controlling the admission of fluid pressure into either end oi the cylinder, and means operated by the piston when the ram is fully retracted to re store the valve to neutral position.

12. In a saw mill carriage, the combination of a guideway having a ram mounted for reciprocation therein, said ram being formed at its rear end with a piston, a cylinder within which the piston operates, a valve controlling the admission of fluid pressure into either end of the cylinder, a lever for operating the valve, and a tappet pin in the end of the cylinder and engageable by the piston when the ram is fully retracted to rock said lever and restore the valve to neutral position.

13. In a saw mill carriage, the combination of a guideway having a ram mounted for reciprocation therein, said ram being formed at its rear end with a piston, a cylinder within which the piston operates, a valve controlling the admission 0t fluid pressure into either end of the cylinder, a lever for operating the valve, and means operated by the piston when the ram is fully retracted to rock said lever and restore the valve to neutral position.

1-1. In combination with a saw mill carriage, a hollow knee, a ram carried thereby and projectable therefrom, means for operating the ram by fluid pressure, and means for positively stopping the retractive movement of said ram with its face at different distances from the face ofthe knee.

15. In combination with a saw mill carriage, a hollow knee, a ram carried thereby and projectable from the face of the knee at different distances, fluid pressure operated 7 riage, a hollow knee, a ram carried therebyand projectable therefrom, means for operating the ram by fluid pressure, means for positively stopping-the retractive movement of said ram with its face at different dis- 7 tances from the face of the ,knee, a self-censure, and a lever for operating the valve in either direction. a

17. In combination with a saw mill carriage, a hollow knee, a ram carried thereby and projectable therefrom, means operable by fluid pressure to project and retract the ram, means for positively stopping the retractive movement of the ram with its face at different distances fromthe face of the knee, a self-centering valve for controlling the fluid pressure, and a lever for operating the valve in either direction, the movement of the lever in one direction being controlled by the rearward movement of the ram;

In testimony, that I claim the foregoing as Y my own, I have hereto affixed my si nature. tering Valve for controlllng the fluid pres- PAUL FREDRICK 'LUirrH. 

